In May 2025 the KrebsOnSecurity site suffered a massive DDoS attack of approximately 6.3 Tbps. According to the information reported, it was a brief incident ( approximately 40 to 45 seconds) designed as a test of a new IoT botnet called Aisuru. The magnitude of the attack was unprecedented: it exceeded the 2016 Mirai attack (623 Gbps) by a factor of ten. At the time, the affected entity was under the protection of Google Project Shield (free anti-DDoS service for media), and Google confirmed that this was the largest attack its infrastructure had ever suffered. This incident is a clear example that DDoS attacks are becoming more and more powerful, and can compromise even the most prepared entities, so we will explain in detail the topic of DDoS attacks.